Se meu elefante falasse
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Transcript of Se meu elefante falasse
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/newbot-createanewbot/token-generateauthorizationtoken/revoke-revokebotaccesstoken/setname-changeabot'sname/setdescription-changebotdescription/setabouttext-changebotaboutinfo/setuserpic-changebotprofilephoto/setcommands-changebotcommandslist/setjoingroups-canyourbotbeaddedtogroups?/setprivacy-whatmessagesdoesyourbotseeingroups?/deletebot-deleteabot/cancel-cancelthecurrentoperation
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#\dtpg_catalog.ListofrelationsSchema|Name|Type|Owner------------+-------------------------+-------+----------pg_catalog|pg_aggregate|table|postgres...pg_catalog|pg_class|table|postgres...pg_catalog|pg_database|table|postgrespg_catalog|pg_foreign_data_wrapper|table|postgrespg_catalog|pg_foreign_server|table|postgrespg_catalog|pg_foreign_table|table|postgrespg_catalog|pg_index|table|postgres...pg_catalog|pg_language|table|postgres...pg_catalog|pg_operator|table|postgres...pg_catalog|pg_type|table|postgrespg_catalog|pg_user_mapping|table|postgres
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CREATEEXTENSIONpostgres_fdw;CREATESERVERservidor_de_consultasFOREIGNDATAWRAPPERpostgres_fdwOPTIONS(host'192.168.1.1',dbname'banco',port'5432');CREATEUSERMAPPINGFORCURRENT_USERSERVERservidor_de_consultasOPTIONS(user'usuario_consulta',password'consulta');CREATEFOREIGNTABLEpessoas(cpfnumeric,nomevarchar)SERVERservidor_de_consultasOPTIONS(schema_name'recursos_humanos',table_name'tb_funcionarios');
EXPLAIN(ANALYZE,VERBOSE,BUFFERS)SELECT*FROMpessoasWHEREcpf=1234567891;-------------------------------------------------------ForeignScanonpublic.pessoas(cost=100.00..118.06rows=3width=104)(actualtime=46.039..46.040rows=1loops=1)Output:cpf,nomeRemoteSQL:SELECTcpf,nomeFROMrecursos_humanos.tb_funcionariosWHERE((cpf=1234567891::numeric))Planningtime:0.061msExecutiontime:105.232ms
CREATEFOREIGNTABLEvalores_constantes(resultado1charactervarying,resultado2charactervarying)servermulticorn_srvoptions(wrapper'myfdw.ConstantForeignDataWrapper')
SELECT*fromvalores_constantes;
SELECT*FROMvalores_constantes;
test|test2---------+----------test0|test20test1|test21test2|test22test3|test23test4|test24test5|test25test6|test26test7|test27test8|test28test9|test29(10rows)
voidBeginForeignScan(ForeignScanState*node,inteflags);TupleTableSlot*IterateForeignScan(ForeignScanState*node);voidReScanForeignScan(ForeignScanState*node);voidEndForeignScan(ForeignScanState*node);
List*PlanForeignModify(PlannerInfo*root,ModifyTable*plan,IndexresultRelation,intsubplan_index);voidBeginForeignModify(ModifyTableState*mtstate,ResultRelInfo*rinfo,List*fdw_private,intsubplan_index,inteflags);TupleTableSlot*ExecForeignInsert(EState*estate,ResultRelInfo*rinfo,TupleTableSlot*slot,TupleTableSlot*planSlot);TupleTableSlot*ExecForeignUpdate(EState*estate,ResultRelInfo*rinfo,TupleTableSlot*slot,TupleTableSlot*planSlot);TupleTableSlot*ExecForeignDelete(EState*estate,ResultRelInfo*rinfo,TupleTableSlot*slot,TupleTableSlot*planSlot);voidEndForeignModify(EState*estate,ResultRelInfo*rinfo);intIsForeignRelUpdatable(Relationrel);
defexecute(self,quals);
definsert(self,new_values);
defupdate(self,old_values,new_values);
defdelete(self,old_values);
ConstantForeignDataWrapper
$treemyfdw.|--myfdw/|`--__init__.py`--setup.py
ConstantForeignDataWrapper
setup.pysetup(name='myfdw',version='0.0.1',author='SeuNome',license='Postgresql',packages=['myfdw'])
ConstantForeignDataWrapper
__init__.pyfrommulticornimportForeignDataWrapper
classConstantForeignDataWrapper(ForeignDataWrapper):
def__init__(self,options,columns):super(ConstantForeignDataWrapper,self).__init__(options,columns)self.columns=columns
defexecute(self,quals,columns):forindexinrange(10):#arquiestaototalderegistrosline={}forcolumn_nameinself.columns:line[column_name]='%s%s'%(column_name,index)yieldline
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